{
  "manageEntity": {
    "action": "Save",
    "entityId": "549932682",
    "entityType": "Track",
    "nonce": "0x48ded6cb91ae852bbf1aef672272842fcdee4d8b30c550f3c328c1adb65b7e07",
    "signature": "0x2cf5502482520aa03a3502c12af16dcdb80c7a05094de713b09b380b5dbd06ff7232683c0df032df236506e5a633680a619f1ffee4f3302cda773da82d2f89fe1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}